Infrared to visible upconversion luminescence in Er³⁺/Yb³⁺ co-doped CeO₂ inverse opal

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• 作者：Zhengwen Yang ; Hangjun Wu ; Jiayan Liao ; Wucai Li ; Zhiguo Song ; Yong Yang ; Dacheng Zhou ; Rongfei Wang ; Jianbei Qiu
• 关键词：Upconversion ; CeO2 ; Mechanism ; Inverse opal
• 刊名：Materials Science and Engineering: B
• 出版年：2013
• 出版时间：1 September, 2013
• 年：2013
• 卷：178
• 期：15
• 页码：977-981
• 全文大小：2051 K

文摘

Infrared to visible upconversion luminescence has been investigated in Er³⁺/Yb³⁺ co-doped CeO₂ inverse opal. Under the excitation of 980 nm diode lasers, visible emissions centered at 525, 547, 561, 660 and 680 nm are observed, which are assigned to the Er³⁺ transitions of ²H_11/2 ¡ú ⁴I_15/2 (525 nm), ⁴S_3/2 ¡ú ⁴I_15/2 (547, 561 nm), ⁴F_9/2 ¡ú ⁴I_15/2 (660 and 680 nm), respectively. The effect of photonic band gap on the upconversion luminescence intensity was also obtained. Additionally, the upconversion luminescence mechanism was studied. The dependence of Er³⁺ upconversion emission intensity on pump power reveals that it is a two-photon excitation process.